this is the first time I post an addon of UV function extension for blender 2.67+ I wrote ,in short ,It can
smooth your selected uv point in two way,the one to make it circular,the other
smooth the selected uv point while preserving the shape .
to use it : unzip the file and place it to the addon folder.
here is the video
update to 0.1.1
now you can smooth the selected uv affacted by the mesh shape
update to 0.1.2
fix some issue of previous version
update to 1.6:
rename it to UV-Tool.
add the transmission option that will transmits the shape of the first uv line to the following uv.
now you can select the whole circle and turn It to Uniform circle.
this is python edition DLL is no longer required:
update to 1.7:
now when smooting the uv with vertical option on you can keep the uv proportion in vertical.
improve the performance of smooth*3
add the XY proportion option that can keeps the whole proportion of the mesh.
add the copy and paste uv function
available for blender2.76+
fix some bugs(XY proportion error)
(1):fix the use_uv_select_sync mode problem, this version only work in non-use_uv_select_sync mode to avoid some issues.
(2):fix the invaild selection issue ,now if the mesh points is deselected or hide ,the uv wouldn't be excuted.
fix the bug of excution error when you didn't select some faces but the uvs are selected.
update the align function ,now you can decide whether align to the first point or to the last point;
for blender 2.77++:
for blender 2.78++20170226)